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ASVAB General Science Practice Test

Try our free ASVAB General Science Practice Test. The CAT-ASVAB General Science test consists of 16 questions to be completed within 8 minutes. This portion of the exam covers a wide variety of topics including life science, earth science and physical science. To pass this test you will need a broad understanding of biology, geology, meteorology, astronomy, chemistry, and physics. Start your test prep now with our free ASVAB General Science practice questions.

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Question 1

Which of the following is an example of a mineral?

A

Flaxseed

B

Micronutrients

C

Vitamin D

D

Sodium chloride

Question 1 Explanation:

The correct answer is (D). Sodium chloride is another word for salt, a mineral. Flaxseed is a source of fat. Minerals are a type of micronutrient, but micronutrients are not an example of minerals. Vitamin D is a type of vitamin.

Question 2

Which of the following is NOT a blood type?

A

AB

B

A

C

O

D

X

Question 2 Explanation:

The correct answer is (D). The four blood types are A, B, AB, and O. Type AB is the universal recipient, and type O is the universal donor.

Question 3

Which of these planets is located farthest from the sun?

A

Neptune

B

Saturn

C

Jupiter

D

Uranus

Question 3 Explanation:

The correct answer is (A). The order of the planets from the sun is: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune.

Question 4

How many grams are in one kilogram?

A

10

B

100

C

1,000

D

10,000

Question 4 Explanation:

The correct answer is (C). Mass is measured in grams. One kilogram equals 1,000 grams, and one gram equals 1,000 milligrams.

The correct answer is (B). Vultures are considered to be scavengers since they eat dead animals. Decomposers are organisms that break down organic matter from dead animals and plants into simpler substances.

Question 7

Bile is produced by the

A

pancreas

B

stomach

C

liver

D

kidneys

Question 7 Explanation:

The correct answer is (C). Bile is a dark, bitter fluid produced continuously by the liver. Bile helps to digest lipids within the small intestine.

Question 8

What kind of rock is formed when existing rock types are changed by heat and pressure?

A

Metamorphic

B

Igneous

C

Sedimentary

D

Meteorological

Question 8 Explanation:

The correct answer is (A). When the original rock is subjected to extreme heat and pressure, profound physical and chemical changes can occur. The three main types of rocks are metamorphic, igneous, and sedimentary. Metamorphic rocks make up a large part of the Earth's crust. Common metamorphic rocks include marble, slate, gneiss, quartzite, and schist.

Question 9

These subatomic particles have a positive electric charge.

A

Neutrons

B

Protons

C

Electrons

D

Atoms

Question 9 Explanation:

The correct answer is (B). The basic unit of matter is called the Atom. Atoms consist of a dense nucleus surrounded by a cloud of negatively charged electrons. The nucleus contains a mixture of protons which are positively charged, and neutrons, which are electrically neutral.

Question 10

Which of the following is a characteristic of the autonomic nervous system?

A

It regulates the voluntary control of body movements through the skeletal muscles.

B

It regulates involuntary activity in the heart, stomach, lungs, and intestines.

C

It is thought to be the center of intelligence.

D

It is the part of the nervous system consisting of the brain and spinal cord.

Question 10 Explanation:

The correct answer is (B). The somatic nervous system controls voluntary actions, while the autonomic nervous system functions primarily below the level of consciousness to control functions such as heart rate, digestion, respiratory rate, salivation, perspiration, breathing, and swallowing. The central nervous system consists of the brain and spinal cord.

Question 11

Which layer of the atmosphere is closest to the earth?

A

Mesosphere

B

Stratosphere

C

Troposphere

D

Thermosphere

Question 11 Explanation:

The correct answer is (C). The troposphere begins at the Earth's surface and extends up 4-12 miles high. Almost all weather occurs in the Troposphere.

Question 12

Which of Newton's laws proves that:

An object at rest will stay at rest unless an external force acts upon it.

An object in motion won't change its velocity unless an external force acts upon it.

A

Newton's First Law of Motion

B

Newton's Second Law of Motion

C

Newton's Third Law of Motion

D

Newton's Law of Universal Gravitation

Question 12 Explanation:

Newton's First Law is often called the law of inertia. Newton's Second Law: Force=Mass x Acceleration. Newton's Third Law: For every action, there is an equal and opposite re-action.

Question 13

The law of conservation of energy can be restated as which of the following?

A

The total energy of a system always diminishes.

B

Energy cannot be created or destroyed, only changed.

C

The sum of all of the forces is equivalent to the amount of energy in a system.

D

Mechanical and potential energy share an inverse relationship.

Question 13 Explanation:

The correct answer is (B). The law of conservation of energy states that the total energy of an isolated system remains constant. Energy cannot be created or destroyed, but it can change from one form to another. For example, an object dropped from a rooftop will undergo a change from potential energy to kinetic energy and hit the floor with a force equal to the amount of work done on the object by gravity.

Question 14

The International System (SI) unit of force is which of the following?

A

Newton

B

Joule

C

Watt

D

Dyne

Question 14 Explanation:

The correct answer is (A). Force is the product of mass and acceleration. Mass has units of kilograms and acceleration has units of meters per second per second. In honor of Isaac Newton and his equation F=ma, force is measured in newtons.

Question 15

Mitosis is the process by which:

A

eukaryotic cells degrade.

B

energy is liberated.

C

somatic cells replicate.

D

ATP is produced.

Question 15 Explanation:

The correct answer is (C). Mitosis is the process by which cells replicate their chromosomes. The information contained in the cell’s nucleus is duplicated and one cell splits into two. This process occurs in all somatic cells.

Question 16

Which of the following is true of chemical elements?

A

They are made up of different molecules.

B

They are divided into metals and metalloids.

C

They cannot combine to form new compounds.

D

They are pure substances consisting of one type of atom.

Question 16 Explanation:

The correct answer is (D). Chemical elements are substances containing only atoms of a single type. The element Carbon, for example, only contains Carbon atoms. Molecules are compounds of the same or different elements. Chemical elements include metals, metalloids, and nonmetals.

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